I would like to follow this tutorial http://playground.arduino.cc/Main/MultiplexMAX72xx to drive my bicolor matrix (http://shop.boxtec.ch/pub/sure/LE-MM103_1.pdf) with two MAX7219.

Mine it is a common anode matrix, while the tutorial shows the schematics for a common cathode matrix.. does anyone can help me to find the correct schematic? I have tried to search but cannot find anything..

The schematic reported is a bit small.. I think i recognize a couple of resistance 26k R1 and R2.. and a couple capacitor but I don't see their value, any advice with that?

The MAX7219 & MAX7221 LED driver chips are designed for common cathode displays and not really suitable for common anode.From the first paragraph in the datasheet...

Quote

The MAX7219/MAX7221 are compact, serial input/out-put common-cathode display drivers that interfacemicroprocessors (µPs) to 7-segment numeric LED dis-plays of up to 8 digits, bar-graph displays, or 64 indi-vidual LEDs.

It would be a lot simpler to buy a common cathode LED module.

I might seem like an idiot but remember it takes one to know one.Forum user generally fall into three categories (the good, the bad & the a**hole) what category do you fit in?